Kconfig 44 KB

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  1. config ARM
  2. bool
  3. default y
  4. select HAVE_AOUT
  5. select HAVE_IDE
  6. select RTC_LIB
  7. select SYS_SUPPORTS_APM_EMULATION
  8. select GENERIC_ATOMIC64 if (!CPU_32v6K)
  9. select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  10. select HAVE_ARCH_KGDB
  11. select HAVE_KPROBES if (!XIP_KERNEL)
  12. select HAVE_KRETPROBES if (HAVE_KPROBES)
  13. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  14. select HAVE_GENERIC_DMA_COHERENT
  15. select HAVE_KERNEL_GZIP
  16. select HAVE_KERNEL_LZO
  17. select HAVE_KERNEL_LZMA
  18. select HAVE_PERF_EVENTS
  19. select PERF_USE_VMALLOC
  20. help
  21. The ARM series is a line of low-power-consumption RISC chip designs
  22. licensed by ARM Ltd and targeted at embedded applications and
  23. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  24. manufactured, but legacy ARM-based PC hardware remains popular in
  25. Europe. There is an ARM Linux project with a web page at
  26. <http://www.arm.linux.org.uk/>.
  27. config HAVE_PWM
  28. bool
  29. config SYS_SUPPORTS_APM_EMULATION
  30. bool
  31. config GENERIC_GPIO
  32. bool
  33. config GENERIC_TIME
  34. bool
  35. default y
  36. config ARCH_USES_GETTIMEOFFSET
  37. bool
  38. default n
  39. config GENERIC_CLOCKEVENTS
  40. bool
  41. config GENERIC_CLOCKEVENTS_BROADCAST
  42. bool
  43. depends on GENERIC_CLOCKEVENTS
  44. default y if SMP && !LOCAL_TIMERS
  45. config HAVE_TCM
  46. bool
  47. select GENERIC_ALLOCATOR
  48. config HAVE_PROC_CPU
  49. bool
  50. config NO_IOPORT
  51. bool
  52. config EISA
  53. bool
  54. ---help---
  55. The Extended Industry Standard Architecture (EISA) bus was
  56. developed as an open alternative to the IBM MicroChannel bus.
  57. The EISA bus provided some of the features of the IBM MicroChannel
  58. bus while maintaining backward compatibility with cards made for
  59. the older ISA bus. The EISA bus saw limited use between 1988 and
  60. 1995 when it was made obsolete by the PCI bus.
  61. Say Y here if you are building a kernel for an EISA-based machine.
  62. Otherwise, say N.
  63. config SBUS
  64. bool
  65. config MCA
  66. bool
  67. help
  68. MicroChannel Architecture is found in some IBM PS/2 machines and
  69. laptops. It is a bus system similar to PCI or ISA. See
  70. <file:Documentation/mca.txt> (and especially the web page given
  71. there) before attempting to build an MCA bus kernel.
  72. config GENERIC_HARDIRQS
  73. bool
  74. default y
  75. config STACKTRACE_SUPPORT
  76. bool
  77. default y
  78. config HAVE_LATENCYTOP_SUPPORT
  79. bool
  80. depends on !SMP
  81. default y
  82. config LOCKDEP_SUPPORT
  83. bool
  84. default y
  85. config TRACE_IRQFLAGS_SUPPORT
  86. bool
  87. default y
  88. config HARDIRQS_SW_RESEND
  89. bool
  90. default y
  91. config GENERIC_IRQ_PROBE
  92. bool
  93. default y
  94. config GENERIC_LOCKBREAK
  95. bool
  96. default y
  97. depends on SMP && PREEMPT
  98. config RWSEM_GENERIC_SPINLOCK
  99. bool
  100. default y
  101. config RWSEM_XCHGADD_ALGORITHM
  102. bool
  103. config ARCH_HAS_ILOG2_U32
  104. bool
  105. config ARCH_HAS_ILOG2_U64
  106. bool
  107. config ARCH_HAS_CPUFREQ
  108. bool
  109. help
  110. Internal node to signify that the ARCH has CPUFREQ support
  111. and that the relevant menu configurations are displayed for
  112. it.
  113. config GENERIC_HWEIGHT
  114. bool
  115. default y
  116. config GENERIC_CALIBRATE_DELAY
  117. bool
  118. default y
  119. config ARCH_MAY_HAVE_PC_FDC
  120. bool
  121. config ZONE_DMA
  122. bool
  123. config NEED_DMA_MAP_STATE
  124. def_bool y
  125. config GENERIC_ISA_DMA
  126. bool
  127. config FIQ
  128. bool
  129. config ARCH_MTD_XIP
  130. bool
  131. config GENERIC_HARDIRQS_NO__DO_IRQ
  132. def_bool y
  133. config ARM_L1_CACHE_SHIFT_6
  134. bool
  135. help
  136. Setting ARM L1 cache line size to 64 Bytes.
  137. config VECTORS_BASE
  138. hex
  139. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  140. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  141. default 0x00000000
  142. help
  143. The base address of exception vectors.
  144. source "init/Kconfig"
  145. source "kernel/Kconfig.freezer"
  146. menu "System Type"
  147. config MMU
  148. bool "MMU-based Paged Memory Management Support"
  149. default y
  150. help
  151. Select if you want MMU-based virtualised addressing space
  152. support by paged memory management. If unsure, say 'Y'.
  153. #
  154. # The "ARM system type" choice list is ordered alphabetically by option
  155. # text. Please add new entries in the option alphabetic order.
  156. #
  157. choice
  158. prompt "ARM system type"
  159. default ARCH_VERSATILE
  160. config ARCH_AAEC2000
  161. bool "Agilent AAEC-2000 based"
  162. select CPU_ARM920T
  163. select ARM_AMBA
  164. select HAVE_CLK
  165. select ARCH_USES_GETTIMEOFFSET
  166. help
  167. This enables support for systems based on the Agilent AAEC-2000
  168. config ARCH_INTEGRATOR
  169. bool "ARM Ltd. Integrator family"
  170. select ARM_AMBA
  171. select ARCH_HAS_CPUFREQ
  172. select COMMON_CLKDEV
  173. select ICST
  174. select GENERIC_CLOCKEVENTS
  175. select PLAT_VERSATILE
  176. help
  177. Support for ARM's Integrator platform.
  178. config ARCH_REALVIEW
  179. bool "ARM Ltd. RealView family"
  180. select ARM_AMBA
  181. select COMMON_CLKDEV
  182. select ICST
  183. select GENERIC_CLOCKEVENTS
  184. select ARCH_WANT_OPTIONAL_GPIOLIB
  185. select PLAT_VERSATILE
  186. select ARM_TIMER_SP804
  187. select GPIO_PL061 if GPIOLIB
  188. help
  189. This enables support for ARM Ltd RealView boards.
  190. config ARCH_VERSATILE
  191. bool "ARM Ltd. Versatile family"
  192. select ARM_AMBA
  193. select ARM_VIC
  194. select COMMON_CLKDEV
  195. select ICST
  196. select GENERIC_CLOCKEVENTS
  197. select ARCH_WANT_OPTIONAL_GPIOLIB
  198. select PLAT_VERSATILE
  199. select ARM_TIMER_SP804
  200. help
  201. This enables support for ARM Ltd Versatile board.
  202. config ARCH_VEXPRESS
  203. bool "ARM Ltd. Versatile Express family"
  204. select ARCH_WANT_OPTIONAL_GPIOLIB
  205. select ARM_AMBA
  206. select ARM_TIMER_SP804
  207. select COMMON_CLKDEV
  208. select GENERIC_CLOCKEVENTS
  209. select HAVE_CLK
  210. select ICST
  211. select PLAT_VERSATILE
  212. help
  213. This enables support for the ARM Ltd Versatile Express boards.
  214. config ARCH_AT91
  215. bool "Atmel AT91"
  216. select ARCH_REQUIRE_GPIOLIB
  217. select HAVE_CLK
  218. select ARCH_USES_GETTIMEOFFSET
  219. help
  220. This enables support for systems based on the Atmel AT91RM9200,
  221. AT91SAM9 and AT91CAP9 processors.
  222. config ARCH_BCMRING
  223. bool "Broadcom BCMRING"
  224. depends on MMU
  225. select CPU_V6
  226. select ARM_AMBA
  227. select COMMON_CLKDEV
  228. select GENERIC_CLOCKEVENTS
  229. select ARCH_WANT_OPTIONAL_GPIOLIB
  230. help
  231. Support for Broadcom's BCMRing platform.
  232. config ARCH_CLPS711X
  233. bool "Cirrus Logic CLPS711x/EP721x-based"
  234. select CPU_ARM720T
  235. select ARCH_USES_GETTIMEOFFSET
  236. help
  237. Support for Cirrus Logic 711x/721x based boards.
  238. config ARCH_CNS3XXX
  239. bool "Cavium Networks CNS3XXX family"
  240. select CPU_V6
  241. select GENERIC_CLOCKEVENTS
  242. select ARM_GIC
  243. help
  244. Support for Cavium Networks CNS3XXX platform.
  245. config ARCH_GEMINI
  246. bool "Cortina Systems Gemini"
  247. select CPU_FA526
  248. select ARCH_REQUIRE_GPIOLIB
  249. select ARCH_USES_GETTIMEOFFSET
  250. help
  251. Support for the Cortina Systems Gemini family SoCs
  252. config ARCH_EBSA110
  253. bool "EBSA-110"
  254. select CPU_SA110
  255. select ISA
  256. select NO_IOPORT
  257. select ARCH_USES_GETTIMEOFFSET
  258. help
  259. This is an evaluation board for the StrongARM processor available
  260. from Digital. It has limited hardware on-board, including an
  261. Ethernet interface, two PCMCIA sockets, two serial ports and a
  262. parallel port.
  263. config ARCH_EP93XX
  264. bool "EP93xx-based"
  265. select CPU_ARM920T
  266. select ARM_AMBA
  267. select ARM_VIC
  268. select COMMON_CLKDEV
  269. select ARCH_REQUIRE_GPIOLIB
  270. select ARCH_HAS_HOLES_MEMORYMODEL
  271. select ARCH_USES_GETTIMEOFFSET
  272. help
  273. This enables support for the Cirrus EP93xx series of CPUs.
  274. config ARCH_FOOTBRIDGE
  275. bool "FootBridge"
  276. select CPU_SA110
  277. select FOOTBRIDGE
  278. select ARCH_USES_GETTIMEOFFSET
  279. help
  280. Support for systems based on the DC21285 companion chip
  281. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  282. config ARCH_MXC
  283. bool "Freescale MXC/iMX-based"
  284. select GENERIC_CLOCKEVENTS
  285. select ARCH_REQUIRE_GPIOLIB
  286. select COMMON_CLKDEV
  287. help
  288. Support for Freescale MXC/iMX-based family of processors
  289. config ARCH_STMP3XXX
  290. bool "Freescale STMP3xxx"
  291. select CPU_ARM926T
  292. select COMMON_CLKDEV
  293. select ARCH_REQUIRE_GPIOLIB
  294. select GENERIC_CLOCKEVENTS
  295. select USB_ARCH_HAS_EHCI
  296. help
  297. Support for systems based on the Freescale 3xxx CPUs.
  298. config ARCH_NETX
  299. bool "Hilscher NetX based"
  300. select CPU_ARM926T
  301. select ARM_VIC
  302. select GENERIC_CLOCKEVENTS
  303. help
  304. This enables support for systems based on the Hilscher NetX Soc
  305. config ARCH_H720X
  306. bool "Hynix HMS720x-based"
  307. select CPU_ARM720T
  308. select ISA_DMA_API
  309. select ARCH_USES_GETTIMEOFFSET
  310. help
  311. This enables support for systems based on the Hynix HMS720x
  312. config ARCH_IOP13XX
  313. bool "IOP13xx-based"
  314. depends on MMU
  315. select CPU_XSC3
  316. select PLAT_IOP
  317. select PCI
  318. select ARCH_SUPPORTS_MSI
  319. select VMSPLIT_1G
  320. help
  321. Support for Intel's IOP13XX (XScale) family of processors.
  322. config ARCH_IOP32X
  323. bool "IOP32x-based"
  324. depends on MMU
  325. select CPU_XSCALE
  326. select PLAT_IOP
  327. select PCI
  328. select ARCH_REQUIRE_GPIOLIB
  329. help
  330. Support for Intel's 80219 and IOP32X (XScale) family of
  331. processors.
  332. config ARCH_IOP33X
  333. bool "IOP33x-based"
  334. depends on MMU
  335. select CPU_XSCALE
  336. select PLAT_IOP
  337. select PCI
  338. select ARCH_REQUIRE_GPIOLIB
  339. help
  340. Support for Intel's IOP33X (XScale) family of processors.
  341. config ARCH_IXP23XX
  342. bool "IXP23XX-based"
  343. depends on MMU
  344. select CPU_XSC3
  345. select PCI
  346. select ARCH_USES_GETTIMEOFFSET
  347. help
  348. Support for Intel's IXP23xx (XScale) family of processors.
  349. config ARCH_IXP2000
  350. bool "IXP2400/2800-based"
  351. depends on MMU
  352. select CPU_XSCALE
  353. select PCI
  354. select ARCH_USES_GETTIMEOFFSET
  355. help
  356. Support for Intel's IXP2400/2800 (XScale) family of processors.
  357. config ARCH_IXP4XX
  358. bool "IXP4xx-based"
  359. depends on MMU
  360. select CPU_XSCALE
  361. select GENERIC_GPIO
  362. select GENERIC_CLOCKEVENTS
  363. select DMABOUNCE if PCI
  364. help
  365. Support for Intel's IXP4XX (XScale) family of processors.
  366. config ARCH_L7200
  367. bool "LinkUp-L7200"
  368. select CPU_ARM720T
  369. select FIQ
  370. select ARCH_USES_GETTIMEOFFSET
  371. help
  372. Say Y here if you intend to run this kernel on a LinkUp Systems
  373. L7200 Software Development Board which uses an ARM720T processor.
  374. Information on this board can be obtained at:
  375. <http://www.linkupsys.com/>
  376. If you have any questions or comments about the Linux kernel port
  377. to this board, send e-mail to <sjhill@cotw.com>.
  378. config ARCH_DOVE
  379. bool "Marvell Dove"
  380. select PCI
  381. select ARCH_REQUIRE_GPIOLIB
  382. select GENERIC_CLOCKEVENTS
  383. select PLAT_ORION
  384. help
  385. Support for the Marvell Dove SoC 88AP510
  386. config ARCH_KIRKWOOD
  387. bool "Marvell Kirkwood"
  388. select CPU_FEROCEON
  389. select PCI
  390. select ARCH_REQUIRE_GPIOLIB
  391. select GENERIC_CLOCKEVENTS
  392. select PLAT_ORION
  393. help
  394. Support for the following Marvell Kirkwood series SoCs:
  395. 88F6180, 88F6192 and 88F6281.
  396. config ARCH_LOKI
  397. bool "Marvell Loki (88RC8480)"
  398. select CPU_FEROCEON
  399. select GENERIC_CLOCKEVENTS
  400. select PLAT_ORION
  401. help
  402. Support for the Marvell Loki (88RC8480) SoC.
  403. config ARCH_MV78XX0
  404. bool "Marvell MV78xx0"
  405. select CPU_FEROCEON
  406. select PCI
  407. select ARCH_REQUIRE_GPIOLIB
  408. select GENERIC_CLOCKEVENTS
  409. select PLAT_ORION
  410. help
  411. Support for the following Marvell MV78xx0 series SoCs:
  412. MV781x0, MV782x0.
  413. config ARCH_ORION5X
  414. bool "Marvell Orion"
  415. depends on MMU
  416. select CPU_FEROCEON
  417. select PCI
  418. select ARCH_REQUIRE_GPIOLIB
  419. select GENERIC_CLOCKEVENTS
  420. select PLAT_ORION
  421. help
  422. Support for the following Marvell Orion 5x series SoCs:
  423. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  424. Orion-2 (5281), Orion-1-90 (6183).
  425. config ARCH_MMP
  426. bool "Marvell PXA168/910/MMP2"
  427. depends on MMU
  428. select ARCH_REQUIRE_GPIOLIB
  429. select COMMON_CLKDEV
  430. select GENERIC_CLOCKEVENTS
  431. select TICK_ONESHOT
  432. select PLAT_PXA
  433. help
  434. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  435. config ARCH_KS8695
  436. bool "Micrel/Kendin KS8695"
  437. select CPU_ARM922T
  438. select ARCH_REQUIRE_GPIOLIB
  439. select ARCH_USES_GETTIMEOFFSET
  440. help
  441. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  442. System-on-Chip devices.
  443. config ARCH_NS9XXX
  444. bool "NetSilicon NS9xxx"
  445. select CPU_ARM926T
  446. select GENERIC_GPIO
  447. select GENERIC_CLOCKEVENTS
  448. select HAVE_CLK
  449. help
  450. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  451. System.
  452. <http://www.digi.com/products/microprocessors/index.jsp>
  453. config ARCH_W90X900
  454. bool "Nuvoton W90X900 CPU"
  455. select CPU_ARM926T
  456. select ARCH_REQUIRE_GPIOLIB
  457. select COMMON_CLKDEV
  458. select GENERIC_CLOCKEVENTS
  459. help
  460. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  461. At present, the w90x900 has been renamed nuc900, regarding
  462. the ARM series product line, you can login the following
  463. link address to know more.
  464. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  465. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  466. config ARCH_NUC93X
  467. bool "Nuvoton NUC93X CPU"
  468. select CPU_ARM926T
  469. select COMMON_CLKDEV
  470. help
  471. Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
  472. low-power and high performance MPEG-4/JPEG multimedia controller chip.
  473. config ARCH_PNX4008
  474. bool "Philips Nexperia PNX4008 Mobile"
  475. select CPU_ARM926T
  476. select COMMON_CLKDEV
  477. select ARCH_USES_GETTIMEOFFSET
  478. help
  479. This enables support for Philips PNX4008 mobile platform.
  480. config ARCH_PXA
  481. bool "PXA2xx/PXA3xx-based"
  482. depends on MMU
  483. select ARCH_MTD_XIP
  484. select ARCH_HAS_CPUFREQ
  485. select COMMON_CLKDEV
  486. select ARCH_REQUIRE_GPIOLIB
  487. select GENERIC_CLOCKEVENTS
  488. select TICK_ONESHOT
  489. select PLAT_PXA
  490. help
  491. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  492. config ARCH_MSM
  493. bool "Qualcomm MSM"
  494. select HAVE_CLK
  495. select GENERIC_CLOCKEVENTS
  496. help
  497. Support for Qualcomm MSM/QSD based systems. This runs on the
  498. apps processor of the MSM/QSD and depends on a shared memory
  499. interface to the modem processor which runs the baseband
  500. stack and controls some vital subsystems
  501. (clock and power control, etc).
  502. config ARCH_SHMOBILE
  503. bool "Renesas SH-Mobile"
  504. help
  505. Support for Renesas's SH-Mobile ARM platforms
  506. config ARCH_RPC
  507. bool "RiscPC"
  508. select ARCH_ACORN
  509. select FIQ
  510. select TIMER_ACORN
  511. select ARCH_MAY_HAVE_PC_FDC
  512. select HAVE_PATA_PLATFORM
  513. select ISA_DMA_API
  514. select NO_IOPORT
  515. select ARCH_SPARSEMEM_ENABLE
  516. select ARCH_USES_GETTIMEOFFSET
  517. help
  518. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  519. CD-ROM interface, serial and parallel port, and the floppy drive.
  520. config ARCH_SA1100
  521. bool "SA1100-based"
  522. select CPU_SA1100
  523. select ISA
  524. select ARCH_SPARSEMEM_ENABLE
  525. select ARCH_MTD_XIP
  526. select ARCH_HAS_CPUFREQ
  527. select CPU_FREQ
  528. select GENERIC_CLOCKEVENTS
  529. select HAVE_CLK
  530. select TICK_ONESHOT
  531. select ARCH_REQUIRE_GPIOLIB
  532. help
  533. Support for StrongARM 11x0 based boards.
  534. config ARCH_S3C2410
  535. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
  536. select GENERIC_GPIO
  537. select ARCH_HAS_CPUFREQ
  538. select HAVE_CLK
  539. select ARCH_USES_GETTIMEOFFSET
  540. help
  541. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  542. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  543. the Samsung SMDK2410 development board (and derivatives).
  544. Note, the S3C2416 and the S3C2450 are so close that they even share
  545. the same SoC ID code. This means that there is no seperate machine
  546. directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
  547. config ARCH_S3C64XX
  548. bool "Samsung S3C64XX"
  549. select PLAT_SAMSUNG
  550. select CPU_V6
  551. select ARM_VIC
  552. select HAVE_CLK
  553. select NO_IOPORT
  554. select ARCH_USES_GETTIMEOFFSET
  555. select ARCH_HAS_CPUFREQ
  556. select ARCH_REQUIRE_GPIOLIB
  557. select SAMSUNG_CLKSRC
  558. select SAMSUNG_IRQ_VIC_TIMER
  559. select SAMSUNG_IRQ_UART
  560. select S3C_GPIO_TRACK
  561. select S3C_GPIO_PULL_UPDOWN
  562. select S3C_GPIO_CFG_S3C24XX
  563. select S3C_GPIO_CFG_S3C64XX
  564. select S3C_DEV_NAND
  565. select USB_ARCH_HAS_OHCI
  566. select SAMSUNG_GPIOLIB_4BIT
  567. help
  568. Samsung S3C64XX series based systems
  569. config ARCH_S5P6440
  570. bool "Samsung S5P6440"
  571. select CPU_V6
  572. select GENERIC_GPIO
  573. select HAVE_CLK
  574. select ARCH_USES_GETTIMEOFFSET
  575. help
  576. Samsung S5P6440 CPU based systems
  577. config ARCH_S5P6442
  578. bool "Samsung S5P6442"
  579. select CPU_V6
  580. select GENERIC_GPIO
  581. select HAVE_CLK
  582. select ARCH_USES_GETTIMEOFFSET
  583. help
  584. Samsung S5P6442 CPU based systems
  585. config ARCH_S5PC100
  586. bool "Samsung S5PC100"
  587. select GENERIC_GPIO
  588. select HAVE_CLK
  589. select CPU_V7
  590. select ARM_L1_CACHE_SHIFT_6
  591. select ARCH_USES_GETTIMEOFFSET
  592. help
  593. Samsung S5PC100 series based systems
  594. config ARCH_S5PV210
  595. bool "Samsung S5PV210/S5PC110"
  596. select CPU_V7
  597. select GENERIC_GPIO
  598. select HAVE_CLK
  599. select ARM_L1_CACHE_SHIFT_6
  600. select ARCH_USES_GETTIMEOFFSET
  601. help
  602. Samsung S5PV210/S5PC110 series based systems
  603. config ARCH_SHARK
  604. bool "Shark"
  605. select CPU_SA110
  606. select ISA
  607. select ISA_DMA
  608. select ZONE_DMA
  609. select PCI
  610. select ARCH_USES_GETTIMEOFFSET
  611. help
  612. Support for the StrongARM based Digital DNARD machine, also known
  613. as "Shark" (<http://www.shark-linux.de/shark.html>).
  614. config ARCH_LH7A40X
  615. bool "Sharp LH7A40X"
  616. select CPU_ARM922T
  617. select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
  618. select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
  619. select ARCH_USES_GETTIMEOFFSET
  620. help
  621. Say Y here for systems based on one of the Sharp LH7A40X
  622. System on a Chip processors. These CPUs include an ARM922T
  623. core with a wide array of integrated devices for
  624. hand-held and low-power applications.
  625. config ARCH_U300
  626. bool "ST-Ericsson U300 Series"
  627. depends on MMU
  628. select CPU_ARM926T
  629. select HAVE_TCM
  630. select ARM_AMBA
  631. select ARM_VIC
  632. select GENERIC_CLOCKEVENTS
  633. select COMMON_CLKDEV
  634. select GENERIC_GPIO
  635. help
  636. Support for ST-Ericsson U300 series mobile platforms.
  637. config ARCH_U8500
  638. bool "ST-Ericsson U8500 Series"
  639. select CPU_V7
  640. select ARM_AMBA
  641. select GENERIC_CLOCKEVENTS
  642. select COMMON_CLKDEV
  643. select ARCH_REQUIRE_GPIOLIB
  644. help
  645. Support for ST-Ericsson's Ux500 architecture
  646. config ARCH_NOMADIK
  647. bool "STMicroelectronics Nomadik"
  648. select ARM_AMBA
  649. select ARM_VIC
  650. select CPU_ARM926T
  651. select COMMON_CLKDEV
  652. select GENERIC_CLOCKEVENTS
  653. select ARCH_REQUIRE_GPIOLIB
  654. help
  655. Support for the Nomadik platform by ST-Ericsson
  656. config ARCH_DAVINCI
  657. bool "TI DaVinci"
  658. select GENERIC_CLOCKEVENTS
  659. select ARCH_REQUIRE_GPIOLIB
  660. select ZONE_DMA
  661. select HAVE_IDE
  662. select COMMON_CLKDEV
  663. select GENERIC_ALLOCATOR
  664. select ARCH_HAS_HOLES_MEMORYMODEL
  665. help
  666. Support for TI's DaVinci platform.
  667. config ARCH_OMAP
  668. bool "TI OMAP"
  669. select HAVE_CLK
  670. select ARCH_REQUIRE_GPIOLIB
  671. select ARCH_HAS_CPUFREQ
  672. select GENERIC_CLOCKEVENTS
  673. select ARCH_HAS_HOLES_MEMORYMODEL
  674. help
  675. Support for TI's OMAP platform (OMAP1 and OMAP2).
  676. config PLAT_SPEAR
  677. bool "ST SPEAr"
  678. select ARM_AMBA
  679. select ARCH_REQUIRE_GPIOLIB
  680. select COMMON_CLKDEV
  681. select GENERIC_CLOCKEVENTS
  682. select HAVE_CLK
  683. help
  684. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  685. endchoice
  686. #
  687. # This is sorted alphabetically by mach-* pathname. However, plat-*
  688. # Kconfigs may be included either alphabetically (according to the
  689. # plat- suffix) or along side the corresponding mach-* source.
  690. #
  691. source "arch/arm/mach-aaec2000/Kconfig"
  692. source "arch/arm/mach-at91/Kconfig"
  693. source "arch/arm/mach-bcmring/Kconfig"
  694. source "arch/arm/mach-clps711x/Kconfig"
  695. source "arch/arm/mach-cns3xxx/Kconfig"
  696. source "arch/arm/mach-davinci/Kconfig"
  697. source "arch/arm/mach-dove/Kconfig"
  698. source "arch/arm/mach-ep93xx/Kconfig"
  699. source "arch/arm/mach-footbridge/Kconfig"
  700. source "arch/arm/mach-gemini/Kconfig"
  701. source "arch/arm/mach-h720x/Kconfig"
  702. source "arch/arm/mach-integrator/Kconfig"
  703. source "arch/arm/mach-iop32x/Kconfig"
  704. source "arch/arm/mach-iop33x/Kconfig"
  705. source "arch/arm/mach-iop13xx/Kconfig"
  706. source "arch/arm/mach-ixp4xx/Kconfig"
  707. source "arch/arm/mach-ixp2000/Kconfig"
  708. source "arch/arm/mach-ixp23xx/Kconfig"
  709. source "arch/arm/mach-kirkwood/Kconfig"
  710. source "arch/arm/mach-ks8695/Kconfig"
  711. source "arch/arm/mach-lh7a40x/Kconfig"
  712. source "arch/arm/mach-loki/Kconfig"
  713. source "arch/arm/mach-msm/Kconfig"
  714. source "arch/arm/mach-mv78xx0/Kconfig"
  715. source "arch/arm/plat-mxc/Kconfig"
  716. source "arch/arm/mach-netx/Kconfig"
  717. source "arch/arm/mach-nomadik/Kconfig"
  718. source "arch/arm/plat-nomadik/Kconfig"
  719. source "arch/arm/mach-ns9xxx/Kconfig"
  720. source "arch/arm/mach-nuc93x/Kconfig"
  721. source "arch/arm/plat-omap/Kconfig"
  722. source "arch/arm/mach-omap1/Kconfig"
  723. source "arch/arm/mach-omap2/Kconfig"
  724. source "arch/arm/mach-orion5x/Kconfig"
  725. source "arch/arm/mach-pxa/Kconfig"
  726. source "arch/arm/plat-pxa/Kconfig"
  727. source "arch/arm/mach-mmp/Kconfig"
  728. source "arch/arm/mach-realview/Kconfig"
  729. source "arch/arm/mach-sa1100/Kconfig"
  730. source "arch/arm/plat-samsung/Kconfig"
  731. source "arch/arm/plat-s3c24xx/Kconfig"
  732. source "arch/arm/plat-s5p/Kconfig"
  733. source "arch/arm/plat-spear/Kconfig"
  734. if ARCH_S3C2410
  735. source "arch/arm/mach-s3c2400/Kconfig"
  736. source "arch/arm/mach-s3c2410/Kconfig"
  737. source "arch/arm/mach-s3c2412/Kconfig"
  738. source "arch/arm/mach-s3c2416/Kconfig"
  739. source "arch/arm/mach-s3c2440/Kconfig"
  740. source "arch/arm/mach-s3c2443/Kconfig"
  741. endif
  742. if ARCH_S3C64XX
  743. source "arch/arm/mach-s3c64xx/Kconfig"
  744. endif
  745. source "arch/arm/mach-s5p6440/Kconfig"
  746. source "arch/arm/mach-s5p6442/Kconfig"
  747. source "arch/arm/mach-s5pc100/Kconfig"
  748. source "arch/arm/mach-s5pv210/Kconfig"
  749. source "arch/arm/mach-shmobile/Kconfig"
  750. source "arch/arm/plat-stmp3xxx/Kconfig"
  751. source "arch/arm/mach-u300/Kconfig"
  752. source "arch/arm/mach-ux500/Kconfig"
  753. source "arch/arm/mach-versatile/Kconfig"
  754. source "arch/arm/mach-vexpress/Kconfig"
  755. source "arch/arm/mach-w90x900/Kconfig"
  756. # Definitions to make life easier
  757. config ARCH_ACORN
  758. bool
  759. config PLAT_IOP
  760. bool
  761. select GENERIC_CLOCKEVENTS
  762. config PLAT_ORION
  763. bool
  764. config PLAT_PXA
  765. bool
  766. config PLAT_VERSATILE
  767. bool
  768. config ARM_TIMER_SP804
  769. bool
  770. source arch/arm/mm/Kconfig
  771. config IWMMXT
  772. bool "Enable iWMMXt support"
  773. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
  774. default y if PXA27x || PXA3xx || ARCH_MMP
  775. help
  776. Enable support for iWMMXt context switching at run time if
  777. running on a CPU that supports it.
  778. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  779. config XSCALE_PMU
  780. bool
  781. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  782. default y
  783. config CPU_HAS_PMU
  784. depends on (CPU_V6 || CPU_V7 || XSCALE_PMU) && \
  785. (!ARCH_OMAP3 || OMAP3_EMU)
  786. default y
  787. bool
  788. if !MMU
  789. source "arch/arm/Kconfig-nommu"
  790. endif
  791. config ARM_ERRATA_411920
  792. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  793. depends on CPU_V6 && !SMP
  794. help
  795. Invalidation of the Instruction Cache operation can
  796. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  797. It does not affect the MPCore. This option enables the ARM Ltd.
  798. recommended workaround.
  799. config ARM_ERRATA_430973
  800. bool "ARM errata: Stale prediction on replaced interworking branch"
  801. depends on CPU_V7
  802. help
  803. This option enables the workaround for the 430973 Cortex-A8
  804. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  805. interworking branch is replaced with another code sequence at the
  806. same virtual address, whether due to self-modifying code or virtual
  807. to physical address re-mapping, Cortex-A8 does not recover from the
  808. stale interworking branch prediction. This results in Cortex-A8
  809. executing the new code sequence in the incorrect ARM or Thumb state.
  810. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  811. and also flushes the branch target cache at every context switch.
  812. Note that setting specific bits in the ACTLR register may not be
  813. available in non-secure mode.
  814. config ARM_ERRATA_458693
  815. bool "ARM errata: Processor deadlock when a false hazard is created"
  816. depends on CPU_V7
  817. help
  818. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  819. erratum. For very specific sequences of memory operations, it is
  820. possible for a hazard condition intended for a cache line to instead
  821. be incorrectly associated with a different cache line. This false
  822. hazard might then cause a processor deadlock. The workaround enables
  823. the L1 caching of the NEON accesses and disables the PLD instruction
  824. in the ACTLR register. Note that setting specific bits in the ACTLR
  825. register may not be available in non-secure mode.
  826. config ARM_ERRATA_460075
  827. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  828. depends on CPU_V7
  829. help
  830. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  831. erratum. Any asynchronous access to the L2 cache may encounter a
  832. situation in which recent store transactions to the L2 cache are lost
  833. and overwritten with stale memory contents from external memory. The
  834. workaround disables the write-allocate mode for the L2 cache via the
  835. ACTLR register. Note that setting specific bits in the ACTLR register
  836. may not be available in non-secure mode.
  837. config PL310_ERRATA_588369
  838. bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
  839. depends on CACHE_L2X0 && ARCH_OMAP4
  840. help
  841. The PL310 L2 cache controller implements three types of Clean &
  842. Invalidate maintenance operations: by Physical Address
  843. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  844. They are architecturally defined to behave as the execution of a
  845. clean operation followed immediately by an invalidate operation,
  846. both performing to the same memory location. This functionality
  847. is not correctly implemented in PL310 as clean lines are not
  848. invalidated as a result of these operations. Note that this errata
  849. uses Texas Instrument's secure monitor api.
  850. endmenu
  851. source "arch/arm/common/Kconfig"
  852. config FORCE_MAX_ZONEORDER
  853. int
  854. depends on SA1111
  855. default "9"
  856. menu "Bus support"
  857. config ARM_AMBA
  858. bool
  859. config ISA
  860. bool
  861. help
  862. Find out whether you have ISA slots on your motherboard. ISA is the
  863. name of a bus system, i.e. the way the CPU talks to the other stuff
  864. inside your box. Other bus systems are PCI, EISA, MicroChannel
  865. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  866. newer boards don't support it. If you have ISA, say Y, otherwise N.
  867. # Select ISA DMA controller support
  868. config ISA_DMA
  869. bool
  870. select ISA_DMA_API
  871. # Select ISA DMA interface
  872. config ISA_DMA_API
  873. bool
  874. config PCI
  875. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
  876. help
  877. Find out whether you have a PCI motherboard. PCI is the name of a
  878. bus system, i.e. the way the CPU talks to the other stuff inside
  879. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  880. VESA. If you have PCI, say Y, otherwise N.
  881. config PCI_DOMAINS
  882. bool
  883. depends on PCI
  884. config PCI_SYSCALL
  885. def_bool PCI
  886. # Select the host bridge type
  887. config PCI_HOST_VIA82C505
  888. bool
  889. depends on PCI && ARCH_SHARK
  890. default y
  891. config PCI_HOST_ITE8152
  892. bool
  893. depends on PCI && MACH_ARMCORE
  894. default y
  895. select DMABOUNCE
  896. source "drivers/pci/Kconfig"
  897. source "drivers/pcmcia/Kconfig"
  898. endmenu
  899. menu "Kernel Features"
  900. source "kernel/time/Kconfig"
  901. config SMP
  902. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  903. depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
  904. MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 ||\
  905. ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
  906. depends on GENERIC_CLOCKEVENTS
  907. select USE_GENERIC_SMP_HELPERS
  908. select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
  909. help
  910. This enables support for systems with more than one CPU. If you have
  911. a system with only one CPU, like most personal computers, say N. If
  912. you have a system with more than one CPU, say Y.
  913. If you say N here, the kernel will run on single and multiprocessor
  914. machines, but will use only one CPU of a multiprocessor machine. If
  915. you say Y here, the kernel will run on many, but not all, single
  916. processor machines. On a single processor machine, the kernel will
  917. run faster if you say N here.
  918. See also <file:Documentation/i386/IO-APIC.txt>,
  919. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  920. <http://www.linuxdoc.org/docs.html#howto>.
  921. If you don't know what to do here, say N.
  922. config HAVE_ARM_SCU
  923. bool
  924. depends on SMP
  925. help
  926. This option enables support for the ARM system coherency unit
  927. config HAVE_ARM_TWD
  928. bool
  929. depends on SMP
  930. help
  931. This options enables support for the ARM timer and watchdog unit
  932. choice
  933. prompt "Memory split"
  934. default VMSPLIT_3G
  935. help
  936. Select the desired split between kernel and user memory.
  937. If you are not absolutely sure what you are doing, leave this
  938. option alone!
  939. config VMSPLIT_3G
  940. bool "3G/1G user/kernel split"
  941. config VMSPLIT_2G
  942. bool "2G/2G user/kernel split"
  943. config VMSPLIT_1G
  944. bool "1G/3G user/kernel split"
  945. endchoice
  946. config PAGE_OFFSET
  947. hex
  948. default 0x40000000 if VMSPLIT_1G
  949. default 0x80000000 if VMSPLIT_2G
  950. default 0xC0000000
  951. config NR_CPUS
  952. int "Maximum number of CPUs (2-32)"
  953. range 2 32
  954. depends on SMP
  955. default "4"
  956. config HOTPLUG_CPU
  957. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  958. depends on SMP && HOTPLUG && EXPERIMENTAL
  959. help
  960. Say Y here to experiment with turning CPUs off and on. CPUs
  961. can be controlled through /sys/devices/system/cpu.
  962. config LOCAL_TIMERS
  963. bool "Use local timer interrupts"
  964. depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
  965. REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
  966. default y
  967. select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
  968. help
  969. Enable support for local timers on SMP platforms, rather then the
  970. legacy IPI broadcast method. Local timers allows the system
  971. accounting to be spread across the timer interval, preventing a
  972. "thundering herd" at every timer tick.
  973. source kernel/Kconfig.preempt
  974. config HZ
  975. int
  976. default 128 if ARCH_L7200
  977. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || ARCH_S5P6442 || ARCH_S5PV210
  978. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  979. default AT91_TIMER_HZ if ARCH_AT91
  980. default 100
  981. config THUMB2_KERNEL
  982. bool "Compile the kernel in Thumb-2 mode"
  983. depends on CPU_V7 && EXPERIMENTAL
  984. select AEABI
  985. select ARM_ASM_UNIFIED
  986. help
  987. By enabling this option, the kernel will be compiled in
  988. Thumb-2 mode. A compiler/assembler that understand the unified
  989. ARM-Thumb syntax is needed.
  990. If unsure, say N.
  991. config ARM_ASM_UNIFIED
  992. bool
  993. config AEABI
  994. bool "Use the ARM EABI to compile the kernel"
  995. help
  996. This option allows for the kernel to be compiled using the latest
  997. ARM ABI (aka EABI). This is only useful if you are using a user
  998. space environment that is also compiled with EABI.
  999. Since there are major incompatibilities between the legacy ABI and
  1000. EABI, especially with regard to structure member alignment, this
  1001. option also changes the kernel syscall calling convention to
  1002. disambiguate both ABIs and allow for backward compatibility support
  1003. (selected with CONFIG_OABI_COMPAT).
  1004. To use this you need GCC version 4.0.0 or later.
  1005. config OABI_COMPAT
  1006. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1007. depends on AEABI && EXPERIMENTAL
  1008. default y
  1009. help
  1010. This option preserves the old syscall interface along with the
  1011. new (ARM EABI) one. It also provides a compatibility layer to
  1012. intercept syscalls that have structure arguments which layout
  1013. in memory differs between the legacy ABI and the new ARM EABI
  1014. (only for non "thumb" binaries). This option adds a tiny
  1015. overhead to all syscalls and produces a slightly larger kernel.
  1016. If you know you'll be using only pure EABI user space then you
  1017. can say N here. If this option is not selected and you attempt
  1018. to execute a legacy ABI binary then the result will be
  1019. UNPREDICTABLE (in fact it can be predicted that it won't work
  1020. at all). If in doubt say Y.
  1021. config ARCH_HAS_HOLES_MEMORYMODEL
  1022. bool
  1023. # Discontigmem is deprecated
  1024. config ARCH_DISCONTIGMEM_ENABLE
  1025. bool
  1026. config ARCH_SPARSEMEM_ENABLE
  1027. bool
  1028. config ARCH_SPARSEMEM_DEFAULT
  1029. def_bool ARCH_SPARSEMEM_ENABLE
  1030. config ARCH_SELECT_MEMORY_MODEL
  1031. def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
  1032. config NODES_SHIFT
  1033. int
  1034. default "4" if ARCH_LH7A40X
  1035. default "2"
  1036. depends on NEED_MULTIPLE_NODES
  1037. config HIGHMEM
  1038. bool "High Memory Support (EXPERIMENTAL)"
  1039. depends on MMU && EXPERIMENTAL
  1040. help
  1041. The address space of ARM processors is only 4 Gigabytes large
  1042. and it has to accommodate user address space, kernel address
  1043. space as well as some memory mapped IO. That means that, if you
  1044. have a large amount of physical memory and/or IO, not all of the
  1045. memory can be "permanently mapped" by the kernel. The physical
  1046. memory that is not permanently mapped is called "high memory".
  1047. Depending on the selected kernel/user memory split, minimum
  1048. vmalloc space and actual amount of RAM, you may not need this
  1049. option which should result in a slightly faster kernel.
  1050. If unsure, say n.
  1051. config HIGHPTE
  1052. bool "Allocate 2nd-level pagetables from highmem"
  1053. depends on HIGHMEM
  1054. depends on !OUTER_CACHE
  1055. config HW_PERF_EVENTS
  1056. bool "Enable hardware performance counter support for perf events"
  1057. depends on PERF_EVENTS && CPU_HAS_PMU
  1058. default y
  1059. help
  1060. Enable hardware performance counter support for perf events. If
  1061. disabled, perf events will use software events only.
  1062. source "mm/Kconfig"
  1063. config LEDS
  1064. bool "Timer and CPU usage LEDs"
  1065. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1066. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1067. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1068. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1069. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1070. ARCH_AT91 || ARCH_DAVINCI || \
  1071. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1072. help
  1073. If you say Y here, the LEDs on your machine will be used
  1074. to provide useful information about your current system status.
  1075. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1076. be able to select which LEDs are active using the options below. If
  1077. you are compiling a kernel for the EBSA-110 or the LART however, the
  1078. red LED will simply flash regularly to indicate that the system is
  1079. still functional. It is safe to say Y here if you have a CATS
  1080. system, but the driver will do nothing.
  1081. config LEDS_TIMER
  1082. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1083. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1084. || MACH_OMAP_PERSEUS2
  1085. depends on LEDS
  1086. depends on !GENERIC_CLOCKEVENTS
  1087. default y if ARCH_EBSA110
  1088. help
  1089. If you say Y here, one of the system LEDs (the green one on the
  1090. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1091. will flash regularly to indicate that the system is still
  1092. operational. This is mainly useful to kernel hackers who are
  1093. debugging unstable kernels.
  1094. The LART uses the same LED for both Timer LED and CPU usage LED
  1095. functions. You may choose to use both, but the Timer LED function
  1096. will overrule the CPU usage LED.
  1097. config LEDS_CPU
  1098. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1099. !ARCH_OMAP) \
  1100. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1101. || MACH_OMAP_PERSEUS2
  1102. depends on LEDS
  1103. help
  1104. If you say Y here, the red LED will be used to give a good real
  1105. time indication of CPU usage, by lighting whenever the idle task
  1106. is not currently executing.
  1107. The LART uses the same LED for both Timer LED and CPU usage LED
  1108. functions. You may choose to use both, but the Timer LED function
  1109. will overrule the CPU usage LED.
  1110. config ALIGNMENT_TRAP
  1111. bool
  1112. depends on CPU_CP15_MMU
  1113. default y if !ARCH_EBSA110
  1114. select HAVE_PROC_CPU if PROC_FS
  1115. help
  1116. ARM processors cannot fetch/store information which is not
  1117. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1118. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1119. fetch/store instructions will be emulated in software if you say
  1120. here, which has a severe performance impact. This is necessary for
  1121. correct operation of some network protocols. With an IP-only
  1122. configuration it is safe to say N, otherwise say Y.
  1123. config UACCESS_WITH_MEMCPY
  1124. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1125. depends on MMU && EXPERIMENTAL
  1126. default y if CPU_FEROCEON
  1127. help
  1128. Implement faster copy_to_user and clear_user methods for CPU
  1129. cores where a 8-word STM instruction give significantly higher
  1130. memory write throughput than a sequence of individual 32bit stores.
  1131. A possible side effect is a slight increase in scheduling latency
  1132. between threads sharing the same address space if they invoke
  1133. such copy operations with large buffers.
  1134. However, if the CPU data cache is using a write-allocate mode,
  1135. this option is unlikely to provide any performance gain.
  1136. endmenu
  1137. menu "Boot options"
  1138. # Compressed boot loader in ROM. Yes, we really want to ask about
  1139. # TEXT and BSS so we preserve their values in the config files.
  1140. config ZBOOT_ROM_TEXT
  1141. hex "Compressed ROM boot loader base address"
  1142. default "0"
  1143. help
  1144. The physical address at which the ROM-able zImage is to be
  1145. placed in the target. Platforms which normally make use of
  1146. ROM-able zImage formats normally set this to a suitable
  1147. value in their defconfig file.
  1148. If ZBOOT_ROM is not enabled, this has no effect.
  1149. config ZBOOT_ROM_BSS
  1150. hex "Compressed ROM boot loader BSS address"
  1151. default "0"
  1152. help
  1153. The base address of an area of read/write memory in the target
  1154. for the ROM-able zImage which must be available while the
  1155. decompressor is running. It must be large enough to hold the
  1156. entire decompressed kernel plus an additional 128 KiB.
  1157. Platforms which normally make use of ROM-able zImage formats
  1158. normally set this to a suitable value in their defconfig file.
  1159. If ZBOOT_ROM is not enabled, this has no effect.
  1160. config ZBOOT_ROM
  1161. bool "Compressed boot loader in ROM/flash"
  1162. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1163. help
  1164. Say Y here if you intend to execute your compressed kernel image
  1165. (zImage) directly from ROM or flash. If unsure, say N.
  1166. config CMDLINE
  1167. string "Default kernel command string"
  1168. default ""
  1169. help
  1170. On some architectures (EBSA110 and CATS), there is currently no way
  1171. for the boot loader to pass arguments to the kernel. For these
  1172. architectures, you should supply some command-line options at build
  1173. time by entering them here. As a minimum, you should specify the
  1174. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1175. config CMDLINE_FORCE
  1176. bool "Always use the default kernel command string"
  1177. depends on CMDLINE != ""
  1178. help
  1179. Always use the default kernel command string, even if the boot
  1180. loader passes other arguments to the kernel.
  1181. This is useful if you cannot or don't want to change the
  1182. command-line options your boot loader passes to the kernel.
  1183. If unsure, say N.
  1184. config XIP_KERNEL
  1185. bool "Kernel Execute-In-Place from ROM"
  1186. depends on !ZBOOT_ROM
  1187. help
  1188. Execute-In-Place allows the kernel to run from non-volatile storage
  1189. directly addressable by the CPU, such as NOR flash. This saves RAM
  1190. space since the text section of the kernel is not loaded from flash
  1191. to RAM. Read-write sections, such as the data section and stack,
  1192. are still copied to RAM. The XIP kernel is not compressed since
  1193. it has to run directly from flash, so it will take more space to
  1194. store it. The flash address used to link the kernel object files,
  1195. and for storing it, is configuration dependent. Therefore, if you
  1196. say Y here, you must know the proper physical address where to
  1197. store the kernel image depending on your own flash memory usage.
  1198. Also note that the make target becomes "make xipImage" rather than
  1199. "make zImage" or "make Image". The final kernel binary to put in
  1200. ROM memory will be arch/arm/boot/xipImage.
  1201. If unsure, say N.
  1202. config XIP_PHYS_ADDR
  1203. hex "XIP Kernel Physical Location"
  1204. depends on XIP_KERNEL
  1205. default "0x00080000"
  1206. help
  1207. This is the physical address in your flash memory the kernel will
  1208. be linked for and stored to. This address is dependent on your
  1209. own flash usage.
  1210. config KEXEC
  1211. bool "Kexec system call (EXPERIMENTAL)"
  1212. depends on EXPERIMENTAL
  1213. help
  1214. kexec is a system call that implements the ability to shutdown your
  1215. current kernel, and to start another kernel. It is like a reboot
  1216. but it is independent of the system firmware. And like a reboot
  1217. you can start any kernel with it, not just Linux.
  1218. It is an ongoing process to be certain the hardware in a machine
  1219. is properly shutdown, so do not be surprised if this code does not
  1220. initially work for you. It may help to enable device hotplugging
  1221. support.
  1222. config ATAGS_PROC
  1223. bool "Export atags in procfs"
  1224. depends on KEXEC
  1225. default y
  1226. help
  1227. Should the atags used to boot the kernel be exported in an "atags"
  1228. file in procfs. Useful with kexec.
  1229. endmenu
  1230. menu "CPU Power Management"
  1231. if ARCH_HAS_CPUFREQ
  1232. source "drivers/cpufreq/Kconfig"
  1233. config CPU_FREQ_SA1100
  1234. bool
  1235. config CPU_FREQ_SA1110
  1236. bool
  1237. config CPU_FREQ_INTEGRATOR
  1238. tristate "CPUfreq driver for ARM Integrator CPUs"
  1239. depends on ARCH_INTEGRATOR && CPU_FREQ
  1240. default y
  1241. help
  1242. This enables the CPUfreq driver for ARM Integrator CPUs.
  1243. For details, take a look at <file:Documentation/cpu-freq>.
  1244. If in doubt, say Y.
  1245. config CPU_FREQ_PXA
  1246. bool
  1247. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1248. default y
  1249. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1250. config CPU_FREQ_S3C64XX
  1251. bool "CPUfreq support for Samsung S3C64XX CPUs"
  1252. depends on CPU_FREQ && CPU_S3C6410
  1253. config CPU_FREQ_S3C
  1254. bool
  1255. help
  1256. Internal configuration node for common cpufreq on Samsung SoC
  1257. config CPU_FREQ_S3C24XX
  1258. bool "CPUfreq driver for Samsung S3C24XX series CPUs"
  1259. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1260. select CPU_FREQ_S3C
  1261. help
  1262. This enables the CPUfreq driver for the Samsung S3C24XX family
  1263. of CPUs.
  1264. For details, take a look at <file:Documentation/cpu-freq>.
  1265. If in doubt, say N.
  1266. config CPU_FREQ_S3C24XX_PLL
  1267. bool "Support CPUfreq changing of PLL frequency"
  1268. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1269. help
  1270. Compile in support for changing the PLL frequency from the
  1271. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1272. after a frequency change, so by default it is not enabled.
  1273. This also means that the PLL tables for the selected CPU(s) will
  1274. be built which may increase the size of the kernel image.
  1275. config CPU_FREQ_S3C24XX_DEBUG
  1276. bool "Debug CPUfreq Samsung driver core"
  1277. depends on CPU_FREQ_S3C24XX
  1278. help
  1279. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1280. config CPU_FREQ_S3C24XX_IODEBUG
  1281. bool "Debug CPUfreq Samsung driver IO timing"
  1282. depends on CPU_FREQ_S3C24XX
  1283. help
  1284. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1285. config CPU_FREQ_S3C24XX_DEBUGFS
  1286. bool "Export debugfs for CPUFreq"
  1287. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1288. help
  1289. Export status information via debugfs.
  1290. endif
  1291. source "drivers/cpuidle/Kconfig"
  1292. endmenu
  1293. menu "Floating point emulation"
  1294. comment "At least one emulation must be selected"
  1295. config FPE_NWFPE
  1296. bool "NWFPE math emulation"
  1297. depends on !AEABI || OABI_COMPAT
  1298. ---help---
  1299. Say Y to include the NWFPE floating point emulator in the kernel.
  1300. This is necessary to run most binaries. Linux does not currently
  1301. support floating point hardware so you need to say Y here even if
  1302. your machine has an FPA or floating point co-processor podule.
  1303. You may say N here if you are going to load the Acorn FPEmulator
  1304. early in the bootup.
  1305. config FPE_NWFPE_XP
  1306. bool "Support extended precision"
  1307. depends on FPE_NWFPE
  1308. help
  1309. Say Y to include 80-bit support in the kernel floating-point
  1310. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1311. Note that gcc does not generate 80-bit operations by default,
  1312. so in most cases this option only enlarges the size of the
  1313. floating point emulator without any good reason.
  1314. You almost surely want to say N here.
  1315. config FPE_FASTFPE
  1316. bool "FastFPE math emulation (EXPERIMENTAL)"
  1317. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1318. ---help---
  1319. Say Y here to include the FAST floating point emulator in the kernel.
  1320. This is an experimental much faster emulator which now also has full
  1321. precision for the mantissa. It does not support any exceptions.
  1322. It is very simple, and approximately 3-6 times faster than NWFPE.
  1323. It should be sufficient for most programs. It may be not suitable
  1324. for scientific calculations, but you have to check this for yourself.
  1325. If you do not feel you need a faster FP emulation you should better
  1326. choose NWFPE.
  1327. config VFP
  1328. bool "VFP-format floating point maths"
  1329. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1330. help
  1331. Say Y to include VFP support code in the kernel. This is needed
  1332. if your hardware includes a VFP unit.
  1333. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1334. release notes and additional status information.
  1335. Say N if your target does not have VFP hardware.
  1336. config VFPv3
  1337. bool
  1338. depends on VFP
  1339. default y if CPU_V7
  1340. config NEON
  1341. bool "Advanced SIMD (NEON) Extension support"
  1342. depends on VFPv3 && CPU_V7
  1343. help
  1344. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1345. Extension.
  1346. endmenu
  1347. menu "Userspace binary formats"
  1348. source "fs/Kconfig.binfmt"
  1349. config ARTHUR
  1350. tristate "RISC OS personality"
  1351. depends on !AEABI
  1352. help
  1353. Say Y here to include the kernel code necessary if you want to run
  1354. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1355. experimental; if this sounds frightening, say N and sleep in peace.
  1356. You can also say M here to compile this support as a module (which
  1357. will be called arthur).
  1358. endmenu
  1359. menu "Power management options"
  1360. source "kernel/power/Kconfig"
  1361. config ARCH_SUSPEND_POSSIBLE
  1362. def_bool y
  1363. endmenu
  1364. source "net/Kconfig"
  1365. source "drivers/Kconfig"
  1366. source "fs/Kconfig"
  1367. source "arch/arm/Kconfig.debug"
  1368. source "security/Kconfig"
  1369. source "crypto/Kconfig"
  1370. source "lib/Kconfig"